1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/java/sql-dk/src/main/java/info/globalcode/sql/dk/Functions.java Mon Mar 04 20:15:24 2019 +0100
1.3 @@ -0,0 +1,254 @@
1.4 +/**
1.5 + * SQL-DK
1.6 + * Copyright © 2013 František Kučera (frantovo.cz)
1.7 + *
1.8 + * This program is free software: you can redistribute it and/or modify
1.9 + * it under the terms of the GNU General Public License as published by
1.10 + * the Free Software Foundation, either version 3 of the License, or
1.11 + * (at your option) any later version.
1.12 + *
1.13 + * This program is distributed in the hope that it will be useful,
1.14 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.15 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.16 + * GNU General Public License for more details.
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License
1.19 + * along with this program. If not, see <http://www.gnu.org/licenses/>.
1.20 + */
1.21 +package info.globalcode.sql.dk;
1.22 +
1.23 +import info.globalcode.sql.dk.configuration.NameIdentified;
1.24 +import info.globalcode.sql.dk.configuration.PropertyDeclaration;
1.25 +import info.globalcode.sql.dk.configuration.PropertyDeclarations;
1.26 +import info.globalcode.sql.dk.formatting.Formatter;
1.27 +import java.io.BufferedReader;
1.28 +import java.io.File;
1.29 +import java.io.IOException;
1.30 +import java.io.InputStream;
1.31 +import java.io.InputStreamReader;
1.32 +import java.io.PrintWriter;
1.33 +import java.util.ArrayList;
1.34 +import java.util.Arrays;
1.35 +import java.util.Collection;
1.36 +import java.util.Collections;
1.37 +import java.util.List;
1.38 +import java.util.Map;
1.39 +import java.util.regex.Matcher;
1.40 +import java.util.regex.Pattern;
1.41 +
1.42 +/**
1.43 + *
1.44 + * @author Ing. František Kučera (frantovo.cz)
1.45 + */
1.46 +public class Functions {
1.47 +
1.48 + private static final String NBSP = " ";
1.49 + private static final Pattern WHITESPACE_TO_REPLACE = Pattern.compile("\\n|\\r|\\t|" + NBSP);
1.50 +
1.51 + private Functions() {
1.52 + }
1.53 +
1.54 + public static boolean equalz(Object a, Object b) {
1.55 + return a == null ? b == null : a.equals(b);
1.56 + }
1.57 +
1.58 + /**
1.59 + *
1.60 + * @param text String to be examinated
1.61 + * @param trim whether text should be trimmed before examination
1.62 + * @return whether text is not empty and one or more characters long (after prospective trim)
1.63 + */
1.64 + public static boolean isEmpty(String text, boolean trim) {
1.65 + if (text == null) {
1.66 + return true;
1.67 + } else {
1.68 + if (trim) {
1.69 + text = text.trim();
1.70 + }
1.71 + return text.isEmpty();
1.72 + }
1.73 + }
1.74 +
1.75 + /**
1.76 + * @see #isEmpty(java.lang.String, boolean)
1.77 + */
1.78 + public static boolean isNotEmpty(String text, boolean trim) {
1.79 + return !isEmpty(text, trim);
1.80 + }
1.81 +
1.82 + public boolean isEmpty(Collection c) {
1.83 + return c == null || c.isEmpty();
1.84 + }
1.85 +
1.86 + public boolean isNotEmpty(Collection c) {
1.87 + return !isEmpty(c);
1.88 + }
1.89 +
1.90 + public boolean isEmpty(Map m) {
1.91 + return m == null || m.isEmpty();
1.92 + }
1.93 +
1.94 + public boolean isNotEmpty(Map m) {
1.95 + return !isEmpty(m);
1.96 + }
1.97 +
1.98 + /**
1.99 + * @return empty collection if given one is null | or the original one
1.100 + */
1.101 + public static <T> Collection<T> notNull(Collection<T> c) {
1.102 + if (c == null) {
1.103 + return Collections.emptyList();
1.104 + } else {
1.105 + return c;
1.106 + }
1.107 + }
1.108 +
1.109 + public static <T extends NameIdentified> T findByName(Collection<T> collection, String name) {
1.110 + for (T element : notNull(collection)) {
1.111 + if (element != null && equalz(element.getName(), name)) {
1.112 + return element;
1.113 + }
1.114 + }
1.115 +
1.116 + return null;
1.117 + }
1.118 +
1.119 + /**
1.120 + * Copy file from Java resources to file system.
1.121 + */
1.122 + public static void installResource(String resourceName, File target) throws IOException {
1.123 + try (BufferedReader reader = new BufferedReader(new InputStreamReader(Functions.class.getClassLoader().getResourceAsStream(resourceName)))) {
1.124 + try (PrintWriter writer = new PrintWriter(target)) {
1.125 + while (true) {
1.126 + String line = reader.readLine();
1.127 + if (line == null) {
1.128 + break;
1.129 + } else {
1.130 + writer.println(line);
1.131 + }
1.132 + }
1.133 + }
1.134 + }
1.135 + }
1.136 +
1.137 + public static String rpad(String s, int n) {
1.138 + if (n > 0) {
1.139 + return String.format("%1$-" + n + "s", s);
1.140 + } else {
1.141 + return s;
1.142 + }
1.143 + }
1.144 +
1.145 + public static String lpad(String s, int n) {
1.146 + if (n > 0) {
1.147 + return String.format("%1$" + n + "s", s);
1.148 + } else {
1.149 + return s;
1.150 + }
1.151 + }
1.152 +
1.153 + public static String repeat(char ch, int count) {
1.154 + char[] array = new char[count];
1.155 + Arrays.fill(array, ch);
1.156 + return new String(array);
1.157 + }
1.158 + private final static char[] HEX_ALPHABET = "0123456789abcdef".toCharArray();
1.159 +
1.160 + public static String toHex(byte[] bytes) {
1.161 + char[] hexChars = new char[bytes.length * 2];
1.162 + for (int j = 0; j < bytes.length; j++) {
1.163 + int v = bytes[j] & 0xFF;
1.164 + hexChars[j * 2] = HEX_ALPHABET[v >>> 4];
1.165 + hexChars[j * 2 + 1] = HEX_ALPHABET[v & 0x0F];
1.166 + }
1.167 + return new String(hexChars);
1.168 + }
1.169 +
1.170 + public static String readString(InputStream in) throws IOException {
1.171 + try (BufferedReader br = new BufferedReader(new InputStreamReader(in))) {
1.172 + StringBuilder result = new StringBuilder();
1.173 + for (String line = br.readLine(); line != null; line = br.readLine()) {
1.174 + result.append(line);
1.175 + result.append('\n');
1.176 + }
1.177 + return result.toString();
1.178 + }
1.179 + }
1.180 +
1.181 + /**
1.182 + * @param <P> type of the last parent
1.183 + * @param <T> type of the examined class
1.184 + * @param type examined class
1.185 + * @param lastParent the last parent type to stop at
1.186 + * @return list of types starting with <code>type</code> and ending with <code>lastParent</code>
1.187 + */
1.188 + public static <P, T extends P> List<Class<? extends P>> getClassHierarchy(Class<T> type, Class<P> lastParent) {
1.189 + List<Class<? extends P>> hierarchy = new ArrayList<>();
1.190 +
1.191 + for (Class current = type; current != null && lastParent.isAssignableFrom(current); current = current.getSuperclass()) {
1.192 + hierarchy.add(current);
1.193 + }
1.194 +
1.195 + return hierarchy;
1.196 + }
1.197 +
1.198 + public static PropertyDeclaration[] getPropertyDeclarations(Class<? extends Formatter> formatterClass) {
1.199 + PropertyDeclarations properties = formatterClass.getAnnotation(PropertyDeclarations.class);
1.200 +
1.201 + if (properties == null) {
1.202 + PropertyDeclaration p = formatterClass.getAnnotation(PropertyDeclaration.class);
1.203 + return p == null ? new PropertyDeclaration[]{} : new PropertyDeclaration[]{p};
1.204 + } else {
1.205 + return properties.value();
1.206 + }
1.207 + }
1.208 +
1.209 + /**
1.210 + * TODO: support background or styles and move to ColorfulPrintWriter
1.211 + *
1.212 + * @param out
1.213 + * @param valueString
1.214 + * @param basicColor
1.215 + * @param escapeColor
1.216 + */
1.217 + public static void printValueWithWhitespaceReplaced(ColorfulPrintWriter out, String valueString, ColorfulPrintWriter.TerminalColor basicColor, ColorfulPrintWriter.TerminalColor escapeColor) {
1.218 +
1.219 + Matcher m = WHITESPACE_TO_REPLACE.matcher(valueString);
1.220 +
1.221 + int start = 0;
1.222 +
1.223 + while (m.find(start)) {
1.224 +
1.225 + printColorOrNot(out, basicColor, valueString.substring(start, m.start()));
1.226 +
1.227 + switch (m.group()) {
1.228 + case "\n":
1.229 + out.print(escapeColor, "↲");
1.230 + break;
1.231 + case "\r":
1.232 + out.print(escapeColor, "⏎");
1.233 + break;
1.234 + case "\t":
1.235 + out.print(escapeColor, "↹");
1.236 + break;
1.237 + case NBSP:
1.238 + out.print(escapeColor, "⎵");
1.239 + break;
1.240 + default:
1.241 + throw new IllegalStateException("Unexpected whitespace token: „" + m.group() + "“");
1.242 + }
1.243 +
1.244 + start = m.end();
1.245 + }
1.246 +
1.247 + printColorOrNot(out, basicColor, valueString.substring(start, valueString.length()));
1.248 + }
1.249 +
1.250 + private static void printColorOrNot(ColorfulPrintWriter out, ColorfulPrintWriter.TerminalColor color, String text) {
1.251 + if (color == null) {
1.252 + out.print(text);
1.253 + } else {
1.254 + out.print(color, text);
1.255 + }
1.256 + }
1.257 +}